[Demonstration 1]

[Buggy Method]
@Override
public String getUsage() {
    StringBuilder sb = new StringBuilder();
    sb.append("[");
    for (String alias : getAlias()) {
        sb.append(getPrefix() + alias + ", ");
    }
    sb.append("] ");
    sb.append("<sub command>\n");
    sb.append("__Sub Commands__\n");
    for (CaexCommand cmd : zomSubCommands) {
        sb.append("[");
        for (String alias : getAlias()) {
            sb.append(getPrefix() + alias + ", ");
        }
        sb.append("] ").append(cmd.getDescription()).append("\n");
    }
    return sb.toString();
}

[Buggy Hunk]
for (String alias : getAlias()) {

[Patch]
for (String alias : cmd.getAlias()) {

[Demonstration 2]

[Buggy Method]
private <T> Map<String, Method> getSetterMethods(Class<T> clazz) {
    Map<String, Method> methods = classSetterMethods.get(clazz.getName());
    if (methods == null) {
        synchronized (this) {
            methods = classSetterMethods.get(clazz.getName());
            if (methods == null) {
                methods = new HashMap<String, Method>();
                Method[] allMethods = clazz.getMethods();
                for (Method method : allMethods) {
                    String methodName = method.getName();
                    if (methodName.length() > 3 && methodName.startsWith("set") && method.getParameterCount() == 1)
                        methods.put(methodName.substring(3), method);
                }
                classSetterMethods.put(clazz.getName(), methods);
            }
        }
    }
    return methods;
}

[Buggy Hunk]
if (methodName.length() > 3 && methodName.startsWith("set") && method.getParameterCount() == 1) methods.put(methodName.substring(3), method);

[Patch]
if (methodName.length() > 3 && methodName.startsWith("set") && method.getParameterTypes().length == 1) methods.put(methodName.substring(3), method);

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));